Amitrole. A highly effective weedkiller that's great for killing a wide array of hard to kill perennial weeds. A non-hormone, non-selective weedkiller. Amitrole controls most broadleaf weeds and grasses. However, its main use is for the control of the more difficult to control weeds including: couch, indian doab, sheeps sorrel, mercer grass, periwinkle, cape ivy, wandering jew, wild onion, docks and bamboo. Features - controls bamboo, couch, wild onion and other difficult weeds.Non-hormonal.Easy to use measure bottle.Directions for useuse 10-20ml per litre of water. For improved wetting, add yates sprayfix at the rate of 3ml/litre. Evenly wet all foliage, avoiding needless run-off onto the soil. Use the higher rate on the difficult weeds listed above.To control bamboo, cut down mature wood and spray regrowth when 1 metre high and in active growth. Hard-to-kill perennials may require repeat applications to achieve a complete kill. Effects may not become noticeable until 3-4 weeks after application.Treated areas can be sown 4 weeks after treatment.Precautions - apply amitrole carefully. Spray drift may cause serious damage to other desirable plants.Flush sprayer out carefully with water and wetting agent immediately after use.